Durability of CFRP strengthened steel plate double-strap joints in accelerated corrosion environments

Batuwitage, Chamila Rajeev Jayanath; Fawzia, Sabrina; Thambiratnam, David; Al-Mahaidi, Riadh

doi:10.1016/j.compstruct.2016.10.101

Cited by 58 publications

(21 citation statements)

References 41 publications

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“…The moisture can change the resin matrix through swelling, plasticization, hydrolysis, and cracking, thereby leading to degradation in the interface property . Batuwitage et al studied the durability of a CFRP‐strengthened steel plate with double‐strap joints using an electrochemical accelerated method. It was found that the degradation of the CFRP becomes dominant when exposed to an accelerated corrosive.…”

Section: Introductionmentioning

confidence: 99%

Durability of CFRP sheets and epoxy resin exposed to natural hygrothermal or cyclic wet‐dry environment

Xie

Guo

et al. 2017

Polymer Composites

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Fiber reinforced polymer (FRP) composites are used in harsh environments, resulting in degradation of their mechanical properties. Such degradation is critical in terms of the reliable design and application of FRP composites. In this study, a set of CFRP flat coupons and epoxy resin matrix flat coupons were prepared and subjected to alternating conditions of 10 h immersion in a 40°C NaCl solution with a concentration of 3.5%, and 14 h drying at 25°C and 60% relative humidity (RH). They were divided into five series, subjected to 0, 60, 120, 240, and 360 wet‐dry cycles, respectively. For a comparison with the acceleration simulation tests, the same numbers of specimens were exposed to a natural hygrothermal environment for 0, 6, 12, 18, and 30 months, respectively. After removal from the environment at the designated time, a series of tension tests were carried out. Based on the experimental results, the relationship regarding the tensile strength degradation of the CFRP sheets between the natural hygrothermal environment and the cyclic wet‐dry environment was determined. It was found that the tensile modulus of the CFRP sheets increased by 1.4%, and the tensile strength and ultimate strain decreased by 8.1% and 8.0% after 360 wet‐dry cycles, respectively. After a 30‐month natural exposure period, the tensile strength, tensile modulus, and ultimate strain of the CFRP sheets decreased by 9.9%, 3.4%, and 7.2%, respectively. The tensile property of the epoxy resin matrix appeared to be more sensitive to these two types of exposure environments than that of the CFRP sheets, and the tensile strength decreased by 59.4% at the end of 30‐month exposure. POLYM. COMPOS., 40:553–567, 2019. © 2017 Society of Plastics Engineers

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Section: Introductionmentioning

confidence: 99%

Durability of CFRP sheets and epoxy resin exposed to natural hygrothermal or cyclic wet‐dry environment

Xie

Guo

et al. 2017

Polymer Composites

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“…where Pu is ultimate load, bp is the width of the plate, Ep and tp are the elastic modulus and thickness of the plate, respectively, and Gf is the fracture energy of the bonded interface (Batuwitage et al, 2017). It was stated in He and Xian's report that the interfacial fracture energy depended on both the ultimate tensile strain of the adhesive (the elastic/shear modulus for the same tensile strength) and the thickness of adhesive layer.…”

Section: Fracture Energymentioning

confidence: 99%

“…Durability often considers the ability of one material to resist cracking, oxidation, chemical degradation, delamination and wear for a specific period of time and under a specific environmental condition (Hollaway and Cadei 2002). According to Batuwitage's research (Batuwitage et al, 2017), degradation of CFRP becomes dominant when CFRP is exposed to accelerated corrosion, resulting in CFRP rupture failure mode. The application of a primer coating prior to installing CFRP is found to be an effective way to enhance the durability and increase load-carrying capacity of double-strap joints.…”

Section: Durabilitymentioning

confidence: 99%

“…The surface preparation method has significant impact on the failure modes and tensile capacity of strap joints. The most efficient and economical surface preparation method is found to be sandblasting and surface cleaning using acetone (Batuwitage et al, 2017). To prepare the Araldite adhesive, small strips of iron wire were cut and mixed in the adhesive mixture.…”

Section: Experimental Testsmentioning

confidence: 99%

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Bonded CFRP to high strength steels

Amraei¹,

Zong

Ahola

et al. 2019

RakMek

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Research on the bond performance of CFRP-strengthened steel have been done for the past years, but it has mainly focused on lower grades of steel. The performance of the bond between ultra-high modulus (UHM) CFRP and high/ultra-high strength steel (HSS/UHSS) is investigated in this paper. A series of experiments have been conducted, with single/double side-strengthened (SSS/DSS) HSS/UHSS with CFRP laminates using Araldite adhesive. It was found that strengthening up to the ultimate strength of the DSS specimens is feasible. However, debonding happens at the ultimate strength of SSS specimens.

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“…The application of carbon fiber reinforced polymer (CFRP) in high-speed trains has shown a tremendous rise in recent years, due to its advantages of high specific modulus, specific strength, toughness, wear resistance, and many molding processes. [1][2][3][4] In the engineering application of CFRP, it is usually necessary to be connected with metals such as 5083P-O aluminum (5083P-O Al), which is mainly used in high-speed train bodies to form a composite structure. To date, several methods have been developed for joining CFRP and metals, including adhesive bonding, welding, riveting, and bolting.…”

Section: Introductionmentioning

confidence: 99%

Effect of anodizing on galvanic corrosion behavior of T300 CFRP/5083P‐O Al bolted joints

Shan

Guo

Gou

et al. 2019

Materials & Corrosion

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T300 carbon fiber reinforced polymer (CFRP) and 5083P‐O aluminum (5083P‐O Al) alloy bolted joints have been used in high‐speed trains due to the advantages of light weight and high strength. However, high potential difference between the CFRP and 5083P‐O Al will induce galvanic corrosion and result in accelerating corrosion rate of 5083P‐O Al, which is a potential risk for its engineering applications. In this work, combination with the electrochemical analysis, surface and cross‐section corrosive morphologies analysis, the galvanic corrosion behavior between CFRP/5083P‐O Al bolted joints with and without anodizing in 3.5 wt.% NaCl spray was investigated. Results indicated that severe corrosion occurred on unanodized 5083P‐O Al in the coupled regions of the CFRP/5083P‐O Al bolted joint due to galvanic corrosion. With the content of sulfuric acid increasing, the thickness of each Al2O3 layer and atomic oxygen content increases significantly. 5083P‐O Al anodized by the 135 g/L H2SO4 + 8 g/L H3BO3 mixed solution had the favorable Al2O3 film, which increased the resistance of 5083P‐O Al by roughly three orders of magnitude, effectively improving the corrosion resistance of 5083P‐O Al.

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Durability of CFRP strengthened steel plate double-strap joints in accelerated corrosion environments

Cited by 58 publications

References 41 publications

Durability of CFRP sheets and epoxy resin exposed to natural hygrothermal or cyclic wet‐dry environment

Durability of CFRP sheets and epoxy resin exposed to natural hygrothermal or cyclic wet‐dry environment

Bonded CFRP to high strength steels

Effect of anodizing on galvanic corrosion behavior of T300 CFRP/5083P‐O Al bolted joints

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